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,G.0. SANDERSON.

Soldering Furnace.

No. 77,921. Patented May 12, 1868.

Nv PETCRS. Phnlwlflhugmphur. Washington D C.

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I GEORGE OLSANDERSON, OF BOSTON, ASSIGNOR TO-HIM SEL'F AND E. D,GOODRIOH, OF CAMBRIDGE, MASSACHUSETTS.

Letters Patent No. 77,921, datehl May 12, 1868.

illlgt some mum in. ia'ipse Eaters sum mu making and at 111mm.-

TO' ALL'WHOM IT MAY CONGERN:

Be it known that I, GEORGE O. SAN DERSON, of Bos-ton in the county ofSuffolk, and State of Massachusetts, have invented certain new anduseful Improvements in Tinners' Furnaces; and I'do hereby declare thatthe following is a full and exact description thereof, reference beinghad to the accompanying drawings, and to the letters of referencemarkedvthereon. y 7 v The nature of 'my invention consists in combininga peculiarly-constructed Bunsen burner with an aircleflector and animproved portable furnace, the whole, when combined, serving as afurnace for heating tinners and plumbers soldering-coppers, or forheating glue for cabinet-makers, 850., 86c.

To enable'others skilled in the art to make and use my invention, I willproceed, to describe its construction a and use. i i i I i In thedra\vings-- Figure 1 represents a perspective view ofmy improved timersfurnace. In this sketch, part of the casing is omitted, so as to showthe interior construction. i i

Figure 2 is a vertical section,

Figure 3 is a plan, and i w V Figure 4 is aperspective' view of theburner with-the air-deflector attached.

"Figure 5 is a vertical section of my Bunsenburner.

I construct my improved furnace 'as'followsf The case, NO, figs. 1 and2, is made of sheetmetal, in form represented in the drawings. The top:of this case has a' large circular opening, as [shown in fig. 3, whichmay be closed by the sliding cover, P,- figs. 1 and 2-. R, fig. 2,is asmall circular opening in therear of the case, through which theproducts of combustion may be taken. K K, figs. land 2, are metallicplates, made fast to the sides of the casc, and so ineli neda s toconccntrate'the heat, and cause it-to pass through the opening S, fig.1; I? K are two similar plates of-metal, attached in the case, andarranged asshown in the drawings, so as to form a heating-chamber. M,figs. land 2, is a fork-shaped piece of metal, upon which anr smallarticle, a soldering-copper for instance, may be placed to be heated. I4 I The front of the case has two openinga'one near the top, throughwhich to place the article to be heated,

and one near the bottom to ndmitaii to-1 supply the'fiame. Neither ofthe openings is shown in the drawings, as the l'crm and size are notess'enti {parts of my invention. i

B, figs; 4 and 5, represents a gas-c 'haviuggattached to its upper enda,ring, W W constructed as shown in the drawings, so as to form a supperi orlthe ms-6A D E. p MyBunsen burner difi'ers fro in all others theform of the tube A D 111: is customary to make this tube cylindrical, orslightly conicah but l make it as shown in fig. 4, that is, havingacircular base and a flattened upper end, D E, so that it admits .ofliaving a large mixing-chambenand yet discharge but a thin sheet of gasat'itsuppcr end, so that thcflame cannot snap dew-n1 I i i All who areconversant with Bunsen -buri1ers,"arc aware that the tubes in which thegas and air are 'mixcd must be -long'in proportion to their-diameters,or they will not work hence, when a large flame is required, has beencustomary to place, anuniber of'small tubes side by side. Bymy inventionI obviate 1 this necessity, for -bysimply flattening the. upper end ofthe tube, the tube itself may be quite largeand yet F work, perfectly IThe air-openings V V, figs. 4 and 5, may bemade as shown in thedrawings.

- i a X, fig. 5, is asmall rod, placed immediately over the orifice oftlic'gas-cock, so that theescaping gas will bedeflected and diffused,and thusmore thoroughly mixed with theiinilowiug air. I G, iig. 4, is apyramidal-shaped deflector, attached to the tube A D E by, thecross-bar.H.

-What I claim as'my invention, and desire to secure by Iietters Patient,is v 1. The flattened tube A D E, whcn madc and arranged substantiallyas described, and for the purpose setiforth. i i v 2. The combination,as well as the arrangement, of a Bunsen burner'with adeflector, G, thepieces K K K K, and the case N 0, made substantially as described, andfor the purpose set forth. r, i GEO. O. SANDERSON.

' W itnesses L A. HUN BERRY,

' F. G. PARKER.

